NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 330
LEVEL 3 COMMUNICATIONS, LLC - OH 183
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-08-29 330-910-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AURORA OH
2018-12-11 330-355-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 KINSMAN OH
2018-08-02 330-341-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HANOVERTON OH
2018-01-23 330-888-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TWINSBURG OH
2015-04-23 330-615-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AKRON OH
2014-08-21 330-222-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WINONA OH
2014-05-23 330-441-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MEDINA OH
2014-05-02 330-302-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LODI OH
2014-05-02 330-624-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BURBANK OH
2014-04-16 330-750-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 YOUNGSTOWN OH
2014-03-21 330-590-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SHARON CTR OH
2014-02-12 330-522-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MINERVA OH
2014-02-06 330-509-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 YOUNGSTOWN OH
2014-01-17 330-496-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BIGPRAIRIE OH
2014-01-17 330-520-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARSHALLVL OH
2014-01-17 330-778-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 APPLECREEK OH
2014-01-17 330-789-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SHREVE OH
2014-01-17 330-857-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 KIDRON OH
2014-01-17 330-944-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SMITHVILLE OH
2014-01-17 330-946-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FREDECKSBG OH
2013-12-24 330-964-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LISBON OH
2013-12-11 330-303-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ELIVERPOOL OH
2013-11-13 330-326-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WINDHAM OH
2013-11-13 330-557-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LAKEMILTON OH
2013-11-13 330-993-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WAYLAND OH
2013-11-12 330-282-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CORTLAND OH
2013-11-12 330-446-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAMASCUS OH
2013-11-12 330-583-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GREENE OH
2013-11-12 330-772-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HARTFORD OH
2013-11-12 330-889-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BRISTOLVL OH
2013-11-12 330-924-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 JOHNSTON OH
2013-11-12 330-997-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BERLIN CTR OH
2013-10-24 330-915-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CANTON OH
2013-09-20 330-227-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ROGERS OH
2013-08-28 330-576-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MONTROSE OH
2013-06-04 330-615-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AKRON OH
2012-11-30 330-915-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CANTON OH
2012-01-31 330-680-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ALLIANCE OH
2011-10-21 330-460-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BRUNSWICK OH
2011-09-06 330-760-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AKRON OH
2011-07-07 330-400-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AKRON OH
2011-03-22 330-400-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AKRON OH
2011-03-04 330-333-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 YOUNGSTOWN OH
2011-03-04 330-597-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ATWATER OH
2011-02-24 330-439-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WOOSTER OH
2011-02-24 330-818-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NO CANTON OH
2011-02-24 330-968-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 KENT OH
2010-12-16 330-787-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 YOUNGSTOWN OH
2010-11-04 330-617-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CANTON OH
2010-11-02 330-787-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 YOUNGSTOWN OH

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.